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FDM vs. SLS

ByCraftcloud Blog

Among the different 3D printing technologies offered at Craftcloud®, Fused Deposition Modeling (FDM) and Selective Laser Sintering (SLS) stand out because of their accessible pricing and complete geometric freedom respectively. But which is more suitable for your project?

The Technologies in a Nutshell

FDM builds parts layer-by-layer by extruding thermoplastic filament (e.g. PLA, PETG, ABS) through a heated nozzle. Because the process relies on gravity and a physical nozzle path, steep overhangs or “floating” features typically require temporary support structures that have to be removed after the print is finished. This technology is widely favored for functional prototyping and simple hobbyist projects due to its cost-effectiveness and the wide variety of available colored filaments.

SLS is an industrial 3D printing technology that uses a high-power laser to fuse small particles of polymer powder into a solid structure. One of the greatest advantages of SLS is that the surrounding unsintered powder acts as a natural support, allowing for the creation of highly complex geometries and interlocking parts without manual supports. Once the print cycle is complete, the part is excavated from the “powder cake” and cleaned, resulting in a durable, isotropic component suitable for end-use engineering applications.

FDM offers a much wider material variety – from colorful, transparent, and sparkling options to wood and carbon fiber composites – while SLS provides a more specialized selection, focusing on more engineering-grade options like nylon and nylon composites (glass, carbon fiber).

Best Use Cases

FDM could be the best option if your project includes:

  • Rapid concept prototyping
  • Custom jigs and tooling
  • Educational or low-cost hobbyist creations

SLS would be more suitable for:

  • Small-batch functional production
  • Complex interlocking assemblies
  • Projects that require high-performance engineering components

Do you want to know how much your model will cost depending on technology and material chosen? Upload it and in a few clicks, have your answer so you can make an informed decision.

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